<?php
$arr=[1,5,10];
$sum=0;
$avg=0;
for($i=0;$i<count($arr);$i++){
    $sum=$sum+$arr[$i];
}
$avg=$sum/count($arr);
echo $sum,'&nbsp',$avg;


?>



<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    
</body>
</html>